Butterflies in the stomach is most often experienced prior to important events, related to nervousness and can be experienced in situations of impending danger. It is common for one to feel butterflies in the stomach when in the early stages of a relationship. It can be caused by nervousness and fear of the unknown. Butterflies in the stomach are often seen as a positive and harmless sign of subconscious feelings for romantic interest and are caused by the release of mood altering endorphins. They are especially frequent in teenage romances and studies show that this symptom is more frequently experienced by females than males. Many adults who have experienced multiple relationships themselves tend to experience this feeling more frequently at the time of an important life event. Sometimes just sitting back, relaxing and taking deep breaths can help to relieve the feeling.